I’m working with spring batch and have a job with two steps the first step (tasklet) validation the header CSV and the second step reads an CSV file and Write to another CSV file like this: I used a FlatFileItemReader (in ClassitemReader) and a FlatFileItemWriter (in ClassiItemWriter), before reading CS…
Tag: csv
Export google CrUX data
I am trying to move a subset of the CrUX data to .csv file(s) for analysis with tools not available on google search console. I tried to export one or more .csv file from a query like so to a google cloud storage bucket (or any other place really): I have tried two different approaches: A. export query result…
Java streams collect excel CSV to a list filtering based on the sum of a column
Suppose we have an excel spreadsheet that looks like: How can I be able to gather to a list of only the IDs of the people whose status count is a sum greater than 0, and if it is 0 or less then discard it. So in the excel spreadsheet above, the list in java should look like: List<Integer> =
Reading column from a CSV and save into a List<List> in java
I am trying to do a simple data frame project which can read, write and make changes from the imported CSV file. This is the CSV file content: I’m trying to read the file and then export the data into columns and rows. And this is the code that I had write: This is the output of the the code:
Java Export Arrays$ArrayList to csv
I’m going to do a Java library on a simple data frame that can read CSV files, edit the CSV and export CSV file. My problem is on how to export it. Here is how I read my CSV file: And this is how I implement the write CSV file: And this is the exception that it throws to me:
parsing csv file dealing with empty value java
I am new to java and practicing parsing csv file. I’ve figured out how to parse and use a constructor to create an instance. However, there are empty strings in my csv file, and the console just throw IllegalArgumentException: No enum constant to me. I’ve referred to: enum valueOf IllegalArgumentE…
How to read csv using column name in java
I have tried reading a column with its index using below code: for eg. As I am passing col index in col1, but I am not able to store the column header text in variable to print that which column is having blank value. Is there any way I can read the column to validate blank cells and then print
How to print only the header into a string in Jackson CSVMapper
I am using Jackson CSVMapper to read a tab separated text file into a list of java objects, and write it back into another tab separated text file. My class looks like this: Parser code: Writer code: I want to extract just the header irrespective of the data. So, should return How can I do it? Thanks! Answer …
How do I escape commas with Jmeter reading from a CSV data set?
I am testing a chat bot with inputs, and one of the rows reads, for example The input is sending only “Just in case”. I have tried Just in case, where is the nearest doctor’s office Answer Did you read the CSV specification (RFC 4180) or the Wikipedia page? It says exactly that you don’…
UNIVOCITY-PARSERS for csv to bean object stopping as soon as error has occured
I’m using UNIVOCITY-PARSERS for converting csv file rows into java objects. while processing the file, if it encounters any problem any of the column in row, then it parsing getting stopped in that row and throwing exception. But i need something which will continue till end of the file just by skipping…